Due to removal of in-tree AWS provider https://github.com/kubernetes/kubernetes/pull/115838 we need to ensure that KCM is setting --external-cloud-volume-plugin flag accordingly, especially that the CSI migration was GA-ed in 4.12/1.25.

The original PR that fixed this (https://github.com/openshift/cluster-kube-controller-manager-operator/pull/721) got reverted by mistake. We need to bring it back to unblock the kube rebase.